Definition of Highland fling in English:

noun

Other numbers featured the Highland fling, a lively Scottish folk dance complete with bagpipes, but combined with elements of ballroom dance, modern dance and even disco, with the troupe members decked out in various glitzy costumes.

At one point they do a Gay Gordons and then a sort of Highland fling.

The men donned kilts, while the women joined in reels and Highland flings.